(A)Scatterplot of percentage change of the mean (left) and standard deviation (right) of neural responses relative to the baseline (angle 0°) for angle 90° (x axis) and angle —90° (y axis) forall electrodes.
(B) Proposed computational model. The auditory spectrogram of speech, S(t,f), is convolved with the electrode’s STRF and then modulated by a gain and a bias factor that depend on the direction of sound.
(C) Mean reduced prediction error of the neural responses relative to baseline (non-spatial STRF) when modulating the gain, the bias, or both in the model. The error bars indicate SE.
(D) Average bias values for five angles from all speech-responsive electrodes colored by right (red) and left (blue) brain hemispheres.
(E) Mean response level (bias) values for five angles from each speech-responsive electrode arranged by ASI and colored by right (red) and left (blue) brain hemispheres.
***p < 0.001. See also Figure S6.